Reenforcing fabric for vehicle tires



I. BRANsoI\I. REENFORCING FABRIC FOR VEHICLE TIRES.

I APPLICATION FILED I Ec.24,'1920.` 1,407,012,y

Patented Feb. 21, 1922.

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UNITED STATES PATENT OFFICE.

THOMAS BRANSON, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO SIBSON &STERN, INC., .A CORPORATION OF PENNSYLVANIA..

REENFORCING FABRIC FOR VEHICLE TIRES.

Specication of Letters ratent.

Patented Feb. 21, 1922.

To' all fwlwm it may con/cem.'

Be it known that I, THOMAS BRANsoN, a citizen of the United States,residing in Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented rubber, are so arranged in the tirestructurey strains induced as to be capableof resisting d. 1 h

ccor ing y, t e

only in one direction.

i paramount requisite of a fabric best suited to i simply inlaying thispurpose, 1s that it possess great tensile strength. Hence, the mainstrands or warps of such fabrics are usually in the form of stout cords,which, as can be readily inferred, are arranged to extend longitudinallyof the fabric structure. y

The object of my invention is to dispose the main strands or .cords ofthe reenforcing fabric in such manner that they will be free, not onlyto admit of being closely compacted laterally, but also to be stretchedabsolutely taut when placed under tension without incurring anyinterference whatever from the binder threads of the ground work bywhich they are incorporated into the fabric structure.I This end Iattain by the cords in a ground work of comparative ine gauge, binderthreads having just su cient strength -to preserve the integrity of thefabric, so that the latter will not yield to undue distortion in thecourse of being coated with, or embedded in the rubber as above noted.

Other ob'ects and advantages of my invention will become a parentfromthe detailed descri tion whicli follows.

The drawing re resents, more or less diagrammatcally, a raofment of afabric structure conveniently emcbodying my invention.

From this illustration, it will be observed that the main strands orcords indica-ted by the numerals 1 to 9 inclusive, extend lon tudinallyof a fabric structure and are 1nlaid in a ground work of interconnectedbinder threads of a comparatively lighter or liner gau e, said binderthreads being represented y characters 10 to 13 inclusive. These binderthreads are interknitto form a series of loop chains 15 to 19 inclusive,which chains are coextensive with the longitudinally running cords andappear upon, what I will designate for convenience, the face of thefabric.

The loop chains are tied together by a peculiar preorderin of theintertwining of the binder threads 1n the course of knitting operation,the result of which may be briefly described as follows:

Tracing, for example, the course of the binder thread 10, it will benoted that the latter is formed into a loop 20 (only partly shown) inthe first chain 15 of the series, this loop being held by a superjacentloop 21 in the same chain. After passin through the loop 21, the thread10 extens, in an angular direction, to the back of the fabric structure,incidentally embracin from behind, -the cords 3, 4, l5, and 6, anthereafter again makes its ap earance, at the front of the fabric, inthel orm of a loop 22 in the comparatively remote chain 18. This loo itwill be noted, extends askew of the cor s 7 and 8 in order to bind them,and is held by the superjacent loop 23 of chain 18, the

last mentloned loop belng likewise disposed askew of the cords 7 and 8,but slanted in a direction opposite to that of loop. 22. After passingthrough the loo again recedes to the back of the fabric and embraces thecords, 3, 4, 5 and 6 a second time, and in so doing extends atan-inclina tioncounter to that of its .first deviation, nallyreappearing as another loop 24 in the vchain 15. The latter loop isconnected to the. loop 20 by the loop 21, previousl referred to, whilesaid loop 24 is held y a supexr'liacent companion loop 26 of the chain15. racing the course of the thread 10 still further, it will beobserved to repeat its deviation to the right behind the cords, 2,

3, 4 and 5, and forms'asecond loop 27 in the chain 18 which loop kis inturn tied to the loop 22 by the intervenin loop 23 of another binderthread. From t is point on, the thread 10 returns again, after a manneralread understood, to form another loop (not si own) in the -chain 15.By virtue of such continual zigzag ing of the binder thread in order tobe ormed into alternate 23, the thread 10 p loops of remotely spacedchains, the cords 3, 4, 5 and 6 are effectively tied into the fabricstructure. By similar reasoning, it will become manifest that the binderthread 11, in'zigzagging between chains 16 and 19, serves to incorporatethe vcords 5, 6, 7 and 8 in a like manner. Furthermore, it is to beparticularly noted that the fields ofthe zigzagging of the severalbinder threads overlap so that one group of cords, embraced at the rearof the fabric, is bound unto the next, while the loops of the chainsskewed alternately in different directions serve to tie togetheradjacent pairs of the cords at the front of the fabric.

A fabric structure having the characteristi cs herein set forth, whilebeing sufliciently flexible laterally to permit the flow of the rubberin the interstices between the longitudinal running cords duringmanufacture into a composite tire material, will not yield to unduedistortion in being passed between the pressure rolls of the machine inwhich this operation is performed. In practice, I employ binder threadsof very light gauge having the roper tensile strength to preserveintegrlty of the fabric in the course of the process above referred to,but which notwithstanding occupy but a comparatively small spaceintermediate the cords. As a consequence, the cords may assume positionsin very close proximity to one another when the fabric is placed undertension longitudinally, and by reason of being only inlaid in thestructure, the cords are rendered free to become taut under tensionwithout interference from the ground work by which they are tied.

The fabric structure of my invention may, as Will be readily understoodby those skilled in the art of knitting, be readily produced on anyordinary knitting loom by predetermining the shiftin of the guides bothfor the cords and bin er threads with respect to the knitting needles.

Having thus described my invention, I claim:

1. A textile structure of the character described includin incombination, a series of cords exten ing longitudinall of the fabric,and a ground work in w ich said cords are inlaid, said groundworkcomprising a series of comparativel light binder threads interknitto form, in a ternation with the cords, a series of coextensive loopchains appearing on the face of the fabric structure, the binderthreads, in order to form loops in remote loop chains, being zigzaggedcrosswise at the back of the fabric to embrace the group of cords 'inthe interval, and the fields comprehended by the zigzagging of theseveral binder threads, arranged to overlap, so

nthat one group of the cords is bound unto the next.

2. A textile structure of the character described including incombination, a series of cords extending longitudinally of the fabric,and a ground Work in which said cords are inlaid, said ground workcomprising a series of comparatively light binder threads interknit toform a series of longitudinally running loop chains, the loops of saidchains lying askew in alternatively opposite directions across a numberof said cords at the face of the fabric, and the binder threads, inorder to form alternate loops in remote loop chains being zigzaggedcrosswise at the back of the fabric to embrace the group of cords in theinterval, and the fields comprehended by the zagzagging of the severalbinder threads, arranged to overlap so that one group of cords is boundunto the next.

In testimony whereof, I have hereunto signed m name at Philadelphia,Pennsylvania, th1s 16th da of December, 1920.

T OMAS BRANSON.

Witnesses JAMES H. BELL, E. L. FULLnm'oN.

